diff --git a/Common/Oroxylum.asmdef b/Common/Oroxylum.asmdef
index 4b96acf670793162efbd028b0a89d084fd77b63b..8b7ffa32279d2a62ff353761ae14760842b1b853 100644
--- a/Common/Oroxylum.asmdef
+++ b/Common/Oroxylum.asmdef
@@ -1,9 +1,7 @@
 {
     "name": "Oroxylum",
     "rootNamespace": "",
-    "references": [
-        "Unity.Mathematics"
-    ],
+    "references": [],
     "includePlatforms": [],
     "excludePlatforms": [],
     "allowUnsafeCode": false,
diff --git a/Common/Utils.cs b/Common/Utils.cs
index 4ebab348969314f019ae32aa4f96d127499a22e9..2d13342a0d28b0e70eec0f5642335bf4258eb459 100644
--- a/Common/Utils.cs
+++ b/Common/Utils.cs
@@ -9,7 +9,6 @@
 
 using System.Collections.Generic;
 using Unity.Collections;
-using Unity.Mathematics;
 using UnityEngine;
 
 namespace Oroxylum
@@ -222,7 +221,7 @@ namespace Oroxylum
             return ret;
         }
 
-        public static long Int2ToLong(int2 v)
+        public static long Int2ToLong(Vector2Int v)
         {
             int q = v.x, r = v.y;
             long rt = (long)q << 32;
@@ -230,11 +229,11 @@ namespace Oroxylum
             return rt;
         }
 
-        public static int2 LongToInt2(long id)
+        public static Vector2Int LongToInt2(long id)
         {
             int x = (int)(id >> 32);
             int y = (int)id;
-            return new int2(x, y);
+            return new Vector2Int(x, y);
         }
 
         /// <summary>
@@ -331,20 +330,6 @@ namespace Oroxylum
             return point;
         }
 
-        /// <summary>
-        /// 将 float4x4 转换为 Matrix4x4；
-        /// </summary>
-        /// <param name="value">float4x4</param>
-        /// <returns>Matrix4x4</returns>
-        public static Matrix4x4 ToMatrix4X4(this float4x4 value) { return new Matrix4x4(value.c0, value.c1, value.c2, value.c3); }
-
-        /// <summary>
-        /// 将 Matrix4x4 转换为 float4x4
-        /// </summary>
-        /// <param name="value">Matrix4x4</param>
-        /// <returns>float4x4</returns>
-        public static float4x4 ToFloat4X4(this Matrix4x4 value) { return new float4x4(value[0], value[1], value[2], value[3]); }
-
         /// <summary>
         /// 将值限制在两个Vector3之间
         /// </summary>
@@ -406,13 +391,6 @@ namespace Oroxylum
             return x + z;
         }
 
-
-        public static float2 XZ_float(this Vector3 p) { return new float2(p.x, p.z); }
-
-        public static Vector3 ToVec3ByXZ(this float2 xz, float y = 0) { return new Vector3(xz.x, y, xz.y); }
-
-        public static float2 Vec2ToFloat2(this Vector2 p) { return new float2(p.x, p.y); }
-
         #endregion
 
         #region 字符串操作
diff --git a/Math/Extensions.Math.cs b/Math/Extensions.Math.cs
index 3eb2cf85aff144d98b4e6eb7da4b08bbda86251e..919164ab7d011c1d720ed0bfe75452e39007ad50 100644
--- a/Math/Extensions.Math.cs
+++ b/Math/Extensions.Math.cs
@@ -90,5 +90,40 @@ namespace Oroxylum
             float z = a.z * b.z;
             return new Vector3(x, y, z);
         }
+
+        public static long Int2ToLong(int2 v)
+        {
+            int q = v.x, r = v.y;
+            long rt = (long)q << 32;
+            rt = rt | (r & 0xffffffff);
+            return rt;
+        }
+
+        public static int2 LongToInt2(long id)
+        {
+            int x = (int)(id >> 32);
+            int y = (int)id;
+            return new int2(x, y);
+        }
+
+        /// <summary>
+        /// 将 float4x4 转换为 Matrix4x4；
+        /// </summary>
+        /// <param name="value">float4x4</param>
+        /// <returns>Matrix4x4</returns>
+        public static Matrix4x4 ToMatrix4X4(this float4x4 value) { return new Matrix4x4(value.c0, value.c1, value.c2, value.c3); }
+
+        /// <summary>
+        /// 将 Matrix4x4 转换为 float4x4
+        /// </summary>
+        /// <param name="value">Matrix4x4</param>
+        /// <returns>float4x4</returns>
+        public static float4x4 ToFloat4X4(this Matrix4x4 value) { return new float4x4(value[0], value[1], value[2], value[3]); }
+
+        public static float2 XZ_float(this Vector3 p) { return new float2(p.x, p.z); }
+
+        public static Vector3 ToVec3ByXZ(this float2 xz, float y = 0) { return new Vector3(xz.x, y, xz.y); }
+
+        public static float2 Vec2ToFloat2(this Vector2 p) { return new float2(p.x, p.y); }
     }
 }